Thursday, September 9, 2010

As promised here are the SILVER rankings for the entire U.S. Senate, but before we get to that, a few graphs.

That's a scatter plot of Senate Republicans, the X axis represents the DW-Nominate score and the Y axis is the PVI score. You'll notice that the scatter plot is basically random and that is reflected in the r-squared number, there isn't much of any correlation between Senate Republicans voting tendencies and the partisan nature of the states they represent.

Here's the Senate Democrats scatterplot:

What you see is a somewhat tighter, somewhat more linear distribution, with an r-squared value approaching 50. The Senate Democrats DW-Nominate and PVI scores are more correlated than the Senate Republicans.

When you put the two graphs together and you can actually see the partisan split.

What you can also see by looking at the SILVER rankings for the entire Senate GOP below, and as Nate pointed out last week, the Tea Party has actually been pretty smart in the incumbents they've taken out, as Bennett and Murkowski are among the least valuable GOP Senators according to this metric.
This is the complete list of Senate Republicans: